Data Receiving Apparatus for Multi-Rate Optical Signals
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Solution Overview
Problem
Existing PON systems, such as those described in Japanese Patent Laying-Open No. 2010-252044, lack a configuration to receive data transmitted at multiple rates where one rate is not necessarily a multiple of another, limiting their adaptability and efficiency.
Innovation Solution
A data receiving apparatus with a path switch and receiving units configured to handle data signals at different rates, allowing the path switch to route input data signals between input and output terminals to appropriate receiving units, and a control circuit to manage these paths based on selected modes and reception results.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If a single receiving unit is used to receive data at one transmission rate, then the device complexity is reduced, but the adaptability to handle multiple transmission rates deteriorates
Solution Approach 1:
The patent implements multi-functionality by providing multiple receiving units (first receiving unit for 1.25 Gbps, second receiving unit for 10.3125 Gbps) that can each handle specific transmission rates. The path switch dynamically routes incoming data to the appropriate receiving unit based on the transmission rate, enabling the system to adapt to multiple standards without requiring a single complex receiver that handles all rates
Solution Approach 2:
The patent applies dynamics through the path switch which dynamically changes signal routing based on the detected transmission rate. The control circuit monitors the incoming data rate and dynamically configures the path switch to connect the appropriate receiving unit, allowing the system to adapt its configuration in real-time according to the transmission requirements
2Adaptability or versatility
If multiple receiving units are provided for different transmission rates, then the adaptability is improved, but the device complexity increases
Solution Approach 1:
The path switch serves as an intermediary component that manages the complexity of routing signals between multiple receiving units. Instead of having multiple complex connections, the path switch acts as a mediator that simplifies the interface between the single input line and multiple receiving units, controlling which receiving unit receives the signal based on the transmission rate
Solution Approach 2:
The patent segments the receiving function into separate receiving units, each optimized for specific transmission rates. This segmentation allows each unit to be simpler and more specialized, while the path switch coordinates them to handle different rate scenarios, reducing the complexity within each individual receiving unit
3Productivity
If the system is designed for a single transmission rate, then the device complexity is reduced, but the productivity in handling multiple rates deteriorates
Solution Approach 1:
The patent applies preliminary action by detecting the transmission rate before routing the data signal. The control circuit examines the incoming signal characteristics in advance, determines the appropriate receiving unit, and pre-configures the path switch accordingly, ensuring that the data is routed to the correct receiver without delay or reconfiguration issues
Data Source
AI summary
A configuration for receiving transmission data at multiple rates where one rate is not necessarily a multiple of another is provided. A host board includes a receiving circuit, a cross point switch, and a switch control circuit. The receiving circuit includes a receiving unit configured to receive a first data signal transmitted at a first rate, and a second receiving unit configured to receive a second data signal transmitted at a second rate different from the first rate. The cross point switch includes input terminals and output terminals. The cross point switch is configured to define a path of signal between the input terminals and the output terminals to route an input data signal to at least one of the first receiving unit and the second receiving unit.